CN101323151B - Automatic cement slurry mixing system and control method - Google Patents

Abstract

The invention discloses an automatic cement slurry mixing system and a control method, which are characterized by comprising a microprocessor (1), wherein the microprocessor (1) is respectively connected with a human-computer interface (2), a dust valve oil cylinder electromagnetic valve (5) and a densimeter (4) through lines, the dust valve oil cylinder electromagnetic valve (5) is connected with a dust valve (3), and a dust valve angular displacement sensor (6) is arranged on the dust valve (3); controlling the cement paste density according to the following steps: data acquisition, density setting and actual density normalization and timed interruption, wherein the current ash valve position is used as a PID integral antecedent, PID calculation is carried out according to the normalization result of the actual density and the density setting, the difference between a PID output value and the ash valve position is used as valve position deviation, the valve position deviation is compared with a dead zone, and the output switching value is used for controlling the action of an electromagnetic valve of an ash valve oil cylinder, so that the cement slurry density is accurately controlled; the operation is simple, and the dynamic density can be automatically controlled.

Description

A kind of automatically compounding cement paste system and control method

Technical field:

The present invention relates to the compounding cement paste technical field, is a kind of automatically compounding cement paste system and control method specifically.

Background technology:

At present, admittedly the mud of intaking mixes normally manual working of slurry operation, complicated operation, labour intensity be big, be difficult to accurately control density, thereby the cement slurry density fluctuation is big, and directly influence mixes and starches quality.

Summary of the invention:

The objective of the invention is to overcome the deficiency of above-mentioned prior art, and a kind of automatically compounding cement paste system is provided.

Another object of the present invention provides a kind of automatically compounding cement paste control method.

The present invention mainly solved existing cement mix slurry complicated operation, labour intensity big, be difficult to accurately control density and influence mixes problems such as slurry quality.

In order to achieve the above object, the present invention is achieved in that a kind of automatically compounding cement paste system, its special character is that it comprises microprocessor 1, microprocessor 1 is connected with densitometer 4 with man-machine interface 2, ash discharging valve oil cylinder magnetic valve 5 respectively by circuit, ash discharging valve oil cylinder magnetic valve 5 is connected with ash discharging valve 3, establish ash discharging valve angular displacement sensor 6 on ash discharging valve 3, ash discharging valve 3 is used for control and metering dry cement flow, and densitometer 4 is used for accurately measuring the actual density of cement mortar.

The control method of a kind of automatically compounding cement paste of the present invention, its special character are to follow these steps to control cement slurry density:

1.1 cement slurry density signal and ash discharging valve valve position signal are gathered in data acquisition;

1.2 setting density is set the setting density that operation will reach;

1.3 set density and actual density normalization, with actual density with set density, obtain the interior value of 0～1.0 scope divided by the densitometer range, be convenient to PID and calculate;

1.4 regularly interrupt, current ash discharging valve valve position as the PID integral forward terms, carried out PID at actual density with the normalization result who sets density and calculated;

1.5 with the difference of PID output valve and ash discharging valve valve position as the valve position deviation;

1.6 valve position deviation and dead band are relatively, the action of output switching value control ash discharging valve oil cylinder magnetic valve, thus control cement slurry density accurately.

After the control method of a kind of automatically compounding cement paste of the present invention, described ash discharging valve valve position are the conversion of ash discharging valve aperture signal process, the ash discharging valve valve position value of the 0-100% that obtains.

Compared with the prior art a kind of automatically compounding cement paste system of the present invention and control method have outstanding substantive distinguishing features and marked improvement, when actual density relatively exceeds the scope of setting with setting density, can be automatically and adjust ash discharging valve timely and accurately, to guarantee to mix the slurry quality.Description of drawings:

Fig. 1 is a connection diagram of the present invention;

Fig. 2 is the flow chart of automatic control of the present invention.

The specific embodiment:

In order to understand better and to implement, provide specific embodiment below in conjunction with accompanying drawing and describe the present invention a kind of automatically compounding cement paste system and control method in detail.

Embodiment 1, referring to Fig. 1,2, the microprocessor 1 of initialize program is connected with densitometer 4 with man-machine interface 2, ash discharging valve oil cylinder magnetic valve 5 respectively by circuit, ash discharging valve oil cylinder magnetic valve 5 is connected with ash discharging valve 3, ash discharging valve angular displacement sensor 6 is installed on ash discharging valve 3, ash discharging valve 3 is used for control and metering dry cement flow, and densitometer 4 is used for accurately measuring the actual density of cement mortar, and microprocessor 1 can be realized the man-machine communication by MPI bus and man-machine interface 2;

The control method of above-mentioned automatically compounding cement paste system follows these steps to control cement slurry density:

1.1 cement slurry density signal and ash discharging valve valve position signal are gathered in data acquisition;

1.2 setting density is set the setting density that operation will reach;

1.3 set density and actual density normalization, with actual density with set density, obtain the interior value of 0～1.0 scope divided by the densitometer range, be convenient to PID and calculate;

1.4 regularly interrupt, current ash discharging valve valve position as the PID integral forward terms, carried out PID at actual density with the normalization result who sets density and calculated;

1.5 with the difference of PID output valve and ash discharging valve valve position as the valve position deviation;

1.6 valve position deviation and dead band are relatively, the action of output switching value control ash discharging valve oil cylinder magnetic valve, thus control cement slurry density accurately.

After described ash discharging valve valve position is the conversion of ash discharging valve aperture signal process, the ash discharging valve valve position value of the 0-100% that obtains.

Claims (2)

1. automatically compounding cement paste system, it is characterized in that it comprises microprocessor (1), microprocessor (1) is connected with man-machine interface (2), ash discharging valve oil cylinder magnetic valve (5) and densitometer (4) respectively by circuit, ash discharging valve oil cylinder magnetic valve (5) is connected with ash discharging valve (3), establishes ash discharging valve angular displacement sensor (6) on ash discharging valve (3); Described densitometer (4) is gathered the cement slurry density signal, and described ash discharging valve angular displacement sensor (6) is gathered the ash discharging valve valve position signal, and above-mentioned two signals only need be gathered by this system.

2. the control method of the described a kind of automatically compounding cement paste of claim 1 system is characterized in that following these steps to control cement slurry density:

1.1 cement slurry density signal and ash discharging valve valve position signal are gathered in data acquisition;

1.2 setting density is set the setting density that operation will reach;

1.3 set density and actual density normalization, with actual density with set density, obtain the interior value of 0～1.0 scope divided by the densitometer range, be convenient to PID and calculate;

1.4 regularly interrupt, current ash discharging valve valve position as the PID integral forward terms, carried out PID at actual density with the normalization result who sets density and calculated;

1.5 with the difference of PID output valve and ash discharging valve valve position as the valve position deviation;

1.6 valve position deviation and dead band are relatively, the action of output switching value control ash discharging valve oil cylinder magnetic valve, thus control cement slurry density accurately.

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